English: This is the twenty-fourth ringed oystercatcher for ornithologist Oleksandr Dobrynsky. His work is fascinating. The birds ringed by the researcher were found in different countries. Oleksandr Dobrynsky is the author of many scientific articles, but most of all likes to work "in the field". With the help of ringing the researchers can follow the fate of the bird and better study population indices (survival rate, reproductive success, life expectancy, mortality at different periods of the life cycle, etc.), peculiarities of nesting and migration behavior.

English: Bird ringing